//¥ ------------------------------------------------------------------------------------------  ¥

//¥

//¥ Copyright © 1996 Apple Computer, Inc., All Rights Reserved

//¥

//¥

//¥     You may incorporate this sample code into your applications without

//¥     restriction, though the sample code has been provided "AS IS" and the

//¥     responsibility for its operation is 100% yours.  However, what you are

//¥     not permitted to do is to redistribute the source as "DSC Sample Code"

//¥     after having made changes. If you're going to re-distribute the source,

//¥     we require that you make it clear in the source that the code was

//¥     descended from Apple Sample Code, but that you've made changes.

//¥

//¥     Authors:

//¥         Chris De Salvo

//¥

//¥ ------------------------------------------------------------------------------------------  ¥

//¥ ------------------------------  Includes

#include <QDOffscreen.h>

#include <Types.h>

#include "Blitter.h"

//¥ ------------------------------  Private Definitions

//¥ ------------------------------  Private Types

//¥ ------------------------------  Private Variables

//¥ ------------------------------  Private Functions

//¥ ------------------------------  Public Variables

//¥ --------------------    TransBitBlit

void

TransBitBlit(UInt8 *image, CGrafPtr dest, UInt32 width, UInt32 height, UInt32 fullWidth, SInt32 x, SInt32 y)

{

UInt32  srcRowBytes, destRowBytes;

UInt8   *srcBits, *destBits;

UInt32  h, v;

    srcRowBytes = fullWidth;

    //¥ Find the base address and rowbytes of the destination buffer

    destRowBytes = (**(*dest).portPixMap).rowBytes & 0x7FFF;

    destBits = (unsigned char *) GetPixBaseAddr(GetGWorldPixMap(dest));

    //¥ Jump down to the target pixel in the destination

    destBits += y * destRowBytes;

    destBits += x;

    srcBits = image;

    for (v = 0; v < height; v++)

    {

        for (h = 0; h < width; h++)

        {

            //¥ Our transparent color is palette index zero

            if (*srcBits)

                *destBits = *srcBits;

            destBits++;

            srcBits++;

        }

        srcBits += srcRowBytes - width;

        destBits += destRowBytes - width;

    }

}